The simple answer again is no.
The zones are tied together with one water source and backflow device, but other than that each zone, station, or valve should be completely independent. That independence is the entire concept of a zone, station, or valve. The zones are made up of irrigation control valves.
I hope this is helping you understand. This is a very common repair that needs to be made.
If there were a problem with all of your zones having low pressure you may conclude that your water source had a problem or you backflow device may have a problem or there may be a leak in the main line.